Typically it takes about 15 minutes for DNS changes to take effect. However, it can occasionally take longer for a change you've made to update across the Internet's DNS system. If you're having trouble with mail flow or other issues after adding DNS records, see Troubleshoot issues after changing your domain name or DNS records.

Change your domain's nameserver (NS) records

To complete setting up your domain with Office 365, you change your domain's NS records at your domain registrar to point to the Office 365 primary and secondary name servers. This sets up Office 365 to update the domain's DNS records for you. We'll add all records so that email, Skype for Business Online, and your public website work with your domain, and you'll be all set.

Caution

When you change your domain's NS records to point to the Office 365 name servers, all the services that are currently associated with your domain are affected. For example, all email sent to your domain (like rob@ your_domain .com) will start coming to Office 365 after you make this change.

Important

When you have completed the steps in this section, the only nameservers that should be listed are these four: > ns1.bdm.microsoftonline.com > ns2.bdm.microsoftonline.com > ns3.bdm.microsoftonline.com > ns4.bdm.microsoftonline.com > The following procedure will show you how to delete any other, unwanted nameservers from the list, and also how to add the correct nameservers if they are not already in the list.

To get started, go to your domains page at Namecheap by using this link. You'll be prompted to Sign in and Continue.

On the Landing page, under Account, select Domain List from the drop-down list.

On the Domain List page, find the name of the domain that you want to edit, and then choose Manage.

Choose Domain.

Find the NAMESERVERS section, and then select Custom from the Namecheap Default drop-down list.

Depending on whether or not there are already nameservers listed on the page that is displayed now, continue to one of the two following procedures.

If there are NO nameservers already listed

Choose ADD NAMESERVER twice to add two new rows.

In the Nameserver boxes, type or copy and paste the values from the following table.

Nameserver 1

ns1.bdm.microsoftonline.com

Nameserver 2

ns2.bdm.microsoftonline.com

Nameserver 3

ns3.bdm.microsoftonline.com

Nameserver 4

ns4.bdm.microsoftonline.com

Choose the Save (check mark) control.

Note

Your nameserver record updates may take up to several hours to update across the Internet's DNS system. Then your Office 365 email and other services will be all set to work with your domain.

If there ARE nameservers already listed

Caution

Follow these steps only if you have existing nameservers other than the four correct nameservers. (That is, delete only any current nameservers that are not named ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com, or ns4.bdm.microsoftonline.com.)

If there are any other nameservers listed in the Nameserver boxes, delete each one by selecting it and then pressing the Delete key on your keyboard.

Choose ADD NAMESERVER twice to add two new rows.

In the Nameserver boxes, type or copy and paste the values from the following table.

Name Server 1

ns1.bdm.microsoftonline.com

Name Server 2

ns2.bdm.microsoftonline.com

Nameserver 3

ns3.bdm.microsoftonline.com

Nameserver 4

ns4.bdm.microsoftonline.com

Choose the Save (check mark) control.

Note

Your nameserver record updates may take up to several hours to update across the Internet's DNS system. Then your Office 365 email and other services will be all set to work with your domain.

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